![background image](http://html1.mh-extra.com/html/flow/mach-300/mach-300_manual_2307753053.webp)
Materials with large air gaps
Some materials contain an air gap. The jet must cut a layer of material, pass through the gap, then
continue cutting. If the gap is less than 0.1 in., the surface finish may be acceptable. With a larger gap,
the stream will tend to expand in the open air, generating a 'blowout' on the next layer of material.
Sometimes it is possible to fill the void to decrease the blowout.
When cutting honeycomb parts you may be able to reduce blowout by angling the mixing tube so that
the stream does not hit perpendicular to the material surface. This is called raking the cutting head.
(Note that blowout cannot always be avoided by using this process).
Thick materials
When cutting thick materials at relatively high speed, the stream exit lags behind the stream entrance
(trailback). Corners or small radii cause the lower region of the stream to deflect outward, creating a less
accurate cut. To avoid this, slow down at all small radii:
• Manually slow down at corners.
• Set the acceleration/deceleration ramping of the manipulator motion to the appropriate value at
the controller. This will change the motion characteristics of the manipulator for every program.
• Change cutting speeds in the part program when necessary. This changes the motion
characteristics only for a particular program
Thin materials
To limit exit burr, use a smaller orifice/ nozzle combination at higher pressures and finer abrasive. On
some materials it is difficult to completely eliminate exit burr.
© 2021 Flow International Corp.
Retrieved from Flow KB on April 13, 2021 PST
Cutting and Applications
Summary of Contents for MACH 300
Page 1: ...MACH 300 SYSTEM MANUAL Includes Ancillary Options M 810 REV C en APRIL 2021...
Page 28: ...View 2 2021 Flow International Corp Retrieved from Flow KB on April 12 2021 PST Safety...
Page 29: ...View 3 2021 Flow International Corp Retrieved from Flow KB on April 12 2021 PST Safety...
Page 107: ...ANCILLARY OPTIONS For Mach 300...